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join — join lines of two files on a common field
join [OPTION...] FILE1 FILE2
For each pair of input lines with identical join fields, write a line to standard output. The default join field is the first, delimited by whitespace. When FILE1 or FILE2 (not both) is −, read standard input.
−a FILENUMalso print unpairable lines from file FILENUM, where FILENUM is 1 or 2, corresponding to FILE1 or FILE2
−e EMPTYreplace missing input fields with EMPTY
−i, −−ignore−caseignore differences in case when comparing fields
−j FIELDequivalent to '−1 FIELD −2 FIELD'
−o FORMATobey FORMAT while constructing output line
−t CHARuse CHAR as input and output field separator
−v FILENUMlike −a FILENUM,
but suppress joined output lines
join on this FIELD of file 1
join on this FIELD of file 2
−−check−ordercheck that the input is correctly sorted, even if all input lines are pairable
−−nocheck−orderdo not check that the input is correctly sorted
−−headertreat the first line in each file as field headers, print them without trying to pair them
−−helpdisplay this help and exit
−−versionoutput version information and exit
Unless −t CHAR is given,
leading blanks separate fields and are ignored, else fields
are separated by CHAR. Any FIELD is a field number counted
from 1. FORMAT is one or more comma or blank separated
specifications, each being 'FILENUM.FIELD' or '0'. Default
FORMAT outputs the join field, the remaining fields from
FILE1, the remaining fields from FILE2, all separated by
CHAR. If FORMAT is the keyword 'auto', then the first line of
each file determines the number of fields output for each
line.
Important: FILE1 and FILE2 must be sorted on the join
fields. E.g., use "sort −k
1b,1" if 'join' has no options, or use "join −t ''" if 'sort' has no options. Note,
comparisons honor the rules specified by 'LC_COLLATE'. If the
input is not sorted and some lines cannot be joined, a
warning message will be given.
Report join bugs to bug−coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report join translation bugs to <http://translationproject.org/team/>
The full documentation for join is maintained as a Texinfo manual. If the info and join programs are properly installed at your site, the command
info coreutils 'join invocation'
should give you access to the complete manual.
| COPYRIGHT |
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Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. |